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HK: Fachverband Hadronen und Kerne

HK 76: Accelerators and Instrumentation II

HK 76.1: Gruppenbericht

Donnerstag, 19. März 2009, 16:30–17:00, H-ZO 90

Status Report of the Darmstadt Polarized Electron Source at the S-DALINAC* — •Christian Eckardt1, Roman Barday1, Uwe Bonnes1, Marco Brunken1, Ralf Eichhorn1, Joachim Enders1, Alf Göök1, Wolfgang F.O. Müller2, Markus Platz1, Yuliya Poltoratska1, Markus Roth1, Markus Wagner1, and Thomas Weiland21Institut für Kernphysik, Technische Universität Darmstadt, Germany — 2Institut für Theorie elektromagnetischer Felder, Technischer Universität Darmstadt, Germany

A source of polarized electrons has been designed and constructed for the superconducting Darmstadt electron linear accelerator S-DALINAC. The source has been set up in a separate test stand for commissioning.

A laser beam stimulates photoemission electrons from a negative electron affinity strained superlattice GaAs cathode. The electron beam is preaccelerated to 100 keV, focused and redirected to the horizontal plane. A Wien filter and Mott polarimeter in the beam line are used to manipulate and measure the polarization. For beam diagnostics wire scanners, fluorescent screens and a coaxial Faraday cup are installed.

Recent results on operation parameters and plans for future development are presented.

*Supported by Deutsche Forschungsgemeinschaft through SFB 634.

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DPG-Physik > DPG-Verhandlungen > 2009 > Bochum